Last



Patented June 9, 1925i..

UNITED STATES PATENT OFFICE.

GEORGE CLAUSING, 0F PORTSMOUTH, OHIO, ASSIGNOR TO THE VULCAN LAST COM IPANY, OF PORTSMOUTH,

OHIO, A. CORPORATION OF OHIO.

LAST.

Application led March 26, 1924. Serial No. 701,986.

To all whom t may concern Be it known that I, GEORGE CLAUsING, a citizen ot' the United States, residing at Portsmouth, in the county of Scioto and State ot' (.)hioA1 have invented certain new and useful Improvements in Lasts, of which the following is a specification, reference being had therein to the accompanying drawiy invention relates t0 lasts.

It is the object of my invention to provide a last having spring links so that the last parts will remain in their expanded or collapsed condition and resist movement from one position to the other.

It. is a further object of my invention to providea dual link construction so arranged that the resiliency and resistance of the link parts that must be overcome will be uniform, no matter whether the `parts are being moved from expanded to collapsed position or viceversa.

It is a still further object of my invention to provide resilient links which will readily return to their original form after the last parts pass by their dead center, as the parts are so arranged that a line drawn betweenl the points of attachment of the links to the last parts will pass over the pivotal center about which the last parts move.

eferring to the drawings:

Figure l is a section through the last in its expanded position. v

Figure 2 is a similar view of the last in its collapsed position.

Figure 3 isa section on the line 3 3 of Figure 1, showing the arrangement of the links and their points of attachment to the last parts.

Figure 4 is a view similar to Figures 1 and 2, showing a modified form of last link with the last in expanded position.

Figure 5 is a similar View of the last in collapsed position.

Referring to the drawings in detail:

1 designates the toe part and 2 the heel part of the last. These two parts are provided with a knuckle or ball and socket joint, of which 3 is the ball and 4 is the socket. The center of the ball is designated 5 and it is about that center that the parts 1 and 2 move. The upper portions of these last parts are out away as at 6 so that the last parts can collapse. The faces 7 limit the movement of the last position.

rIhe pins 8 and 9 in the toe andheel parts respectively are located transversely in such parts and they carry the S-shaped resilient links 1() which have enlarged eyes 11 at the point of their mounting upon the pins 8 and 9. It will be noted that in Figure l a line drawn between the centers of the pins 8 and 9 is below the point 5, while in Figure 2 such a line is above the point 5. When the last parts pass over dead center or this line joining the centers of the pins 8 and 9 passes over the point 5 the S-shaped resilient links 10 flex suiiciently to permit of this passage over dead center. Additional resiliency may :be found in the last parts themselves it they are made of such material as wood.

By having two links in reverse positions it will be apparent that the resistance will be equalized and be made uniform no matter in which direction the parts are being moved.

It will also be observed that the last parts are cut away as at 12 and 13, s0 that the movement of the links and the links themselves may be accommodated within the last parts.

14 designates the modified form of'link which is in the form of a resilient hook. It will be noted that the major portion of such hooks is above the line joining their centers.

The pivotal point indicated on the drawings is only approximate, butit is accurate sufficiently to illustrate the principle of construction as the drawings are not drawn to scale. The fundamental idea is to have the line drawn between the centers 'of the points of attachment pass over the dead center, which in asense is the equivalent of the pivotal point.

It will be understood that I desire to comprehend within my invention various modifications which may be found necessary in adapting it to the various requirements of the art.

Having thus fully described my invention, what I claim as new and desire to secure by Letters Patent, is:

1. In a last, a toe part, a heel part, a joint to permit relative movement of said parts about a center, an S-shaped resilient link connecting said parts, and means for attaching said link to the respective parts.

parts in their expanded.

2. In a last, a toe part, a heel part, a joint to permit relative movement of said parts about a center, an S-shaped resilient link connecting said parts,and means for attaching said link to the respective parts, the points of attachmentof said link being so located that in one position a line drawn between the centers of attachment will be below the center about which the parts move and above the center` in another position of the parts.

3. In a last, a toe part, a heel part, a ball and socket joint therebetween, said parts being so arranged that they move about a common center, S-shaped7 links connecting said parts, and means for mounting said links in the respective parts.

4. In a last, a toe part, a heel part, a ball and socket joint therebetween, said parts being so arranged that they move about a common center, S-shaped links connecting said parts, and means for mounting said links in the respective parts, the points of connection of said links to the parts in expanded position being below said center and in the collapsed position above said center. In a last, a toe part, a heel part, a ball and socket joint therebetween, said parts being so arranged that they move about a common center, S-shaped links connecting said parts, and means for mounting said links in the respective parts, the points of connection of said links to the parts in expanded position being below said center and in the collapsed position above said center, said S-shaped links being reversed in position with respect to one another and being adapted to flex independently of one another.

In testimony whereof, I aix my signa* ture.

GEORGE CLAUSING., 

